Question

Draw the slide under 400X. Indicate the cell type, magnification, and estimate the cell size. 14. Elodea 1. Prepare a wet mount of an Elodea leaf (Anarcharis). You will use one glass slide and cover slip for this entire lab. After preparing each slide, remove the specimen and throw it into the trash. Wash the slide in the sink. Dry the slide with a paper towel very carefully and pat the cover slip dry so that the plastic does not get scratched. Place a drop of water on the center of a glass slide. Use forceps to remove one leaf from the water plant, Elodea. Place the leaf on the drop of water. Place a coverslip over the specimen. Observe the Elodea wet mount with a compound light microscope. The specimen is greater than one cell layer thick. Draw the field of view under 400X below. Include the name, magnification, and estimated cell size. Label the following structures: cell wall, plasma membrane (indicate that the membrane is just inside the cell wall). cytoplasm, and chloroplast 3 4 5 6. 7. Nodea Lea 4X Name, magnification, and size While looking through the oculars, move the fine focus knob toward you slowly until the leaf becomes blurry. While looking through the oculars, slowly move the fine focus knob away from you. How many cell layers do you see? 8. 9. Describe the location of the chloroplasts in your cell. Move the fine focus knob up and 10. observe the three-dimensional arrangement of the cell. Are the chloroplasts moving? If so, describe the movement. What might be the benefit of the cytoplasmic streaming of chloroplasts in an Elodea plant? Clean the slide before proceeding to the next step. 11 Onion Prepare a wet mount of onion epidermis. Obtain one section of an onion. Use forceps to peel a small piece of membrane from the inside curve of the section. You do not want the fleshy portion. Observe the onion epidermis under a compound light microscope. Which structures visible? 12. are 13. CWAOBROW

Answer 1

9) Under microscope, when fine focus slowly rotate then we find two layers of cells

10) Yes, the movement of chloroplast is seen under microscope. Because of movement by means of cytoskeletal elements.

Such movement of chloroplast helps in absorbing light. Such that chloroplast can get more amount of light and can photosynthesize more.

13)

in epidermis we see stomata with presence of guard cells.

each cell has following organelles:

chloroplast, nucleus, Endoplasmic reticulum, golgibody, central vacuoles and lysosome

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